RE: [xml-dev] A Systematic Approach to using Simple XMLVocabularies to Implement Large (Complex) Systems

["Chiusano Joseph" <chiusano_joseph@bah.com>]

[Comment at very end]

> -----Original Message-----
> From: Dave Pawson [mailto:davep@dpawson.co.uk] 
> Sent: Thursday, December 16, 2004 12:34 PM
> To: xml-dev@lists.xml.org
> Subject: RE: [xml-dev] A Systematic Approach to using Simple 
> XMLVocabularies to Implement Large (Complex) Systems
> 
> On Thu, 2004-12-16 at 16:17 +0000, tpassin@comcast.net wrote:
> > Roge Costello wrote -
> 
> > Ha!  My daughter hsa a friend who has brown hair,e xcept 
> that this year it is platinum with purple streaks.  My wife's 
> legal name changed after she married me.  Even SSNs cn be 
> changed (in special circumstances).  Immutable, my foot!
> 
> 
> Has anyone tried to express the validity or  'life' of information?
> E.g.
>  <Person id="RLC>
>     <Name>Roger L. Costello</Bag>
>     <HairColor validity="90d">red</HairColor>
>     <SSN>310-60-1234</SSN>
>  </Person>
> 
> to cater for Toms very real case?
> the semantic could be, suspect this information after 90 
> days, given some reference publication date.

Or, it could be the level of confidence of the observation that the
person has that hair color (i.e. observed at close range, observed
through camera, heard-about through third party, etc.), or some other
meaning. Plus, even with the suggested approach, if the validity
"evaluation levels" changed at some point (perhaps from "after 90 days"
to "after 120 days"), the XML documents would need to be updated.

It's probably best to decouple the representation from its evaluation,
and use the actual observation date, which would not have to change
unless it was determined to be inaccurate. In this way, the evaluation
framework can evolve without requiring updates to the data.

Kind Regards,
Joseph Chiusano
Booz Allen Hamilton
Strategy and Technology Consultants to the World 
> 
> 
> 
> 
> --
> Dave Pawson
> XSLT + Docbook FAQ
> http://www.dpawson.co.uk
> 
> 
> 
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